Her mother, Mamie Jackson, told the news outlet that doctors at Texas Children’s Hospital discovered that Kashala, a student at Attucks Middle School, had a tumor in the back of her head and that it may have worsened because of the fight that occurred near the school on April 18.

Jackson explained that the video shows two girls attacking Kashala and another girl jumping in and kicking her in the head.

The school did not immediately return PEOPLE’s request for comment, but the Houston Independent School District told KTRK in a statement that “the district is aware that several Attucks Middle School students were involved in an off-campus altercation on Thursday. HISD is gathering information and cooperating with the Houston Police Department in its investigation.”

According to Jackson, Kashala returned home, and despite having bruises on her face, said she felt fine. Days later, she became delusional at a friend’s house and woke up with a severe headache.

“I drove over and I told her to get up. I said, ‘Get up, Kashala.’ She kept saying, ‘Mama, my head hurts,’ so she laid down,” Jackson told KTRK.